Improvement in mitre-machines



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JOHN H. BROWN, OFROCKPORT, NEW YORK.

Leners Pawn: No. 89,627, and Ma/y 4, 1869.

MPROVEMENT IN MUERE-MACHINES.

The Schedule :referred to in these Letters Patent and making part of the same.

To all whom it mwy concern:

Beit known'that I, JOHN H. BROWN, of Brockport, in the county ofMonroe, and State of New York, have invented a certain new and useful Improvement in MitlingMachines; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of this specification', in which- Figure 1 is a plan of iny improved machine.

Figure 2, an elevation, with a portion of the frame work broken away.

Figure 3, a section of the clamp-table.

Like letters of reference indicate corresponding parts in all the figures.

VMy improved machine is intended more especially for cutting the mitres of picture and glass-frames, though it is also adapted to other work.

The invention consists, essentially, in the combina- Vtion of two cutter-frames, adjustable to different disbeing a crank-screw, a, which acts upon one table while the other is stationary. v

On these tables are mounted supplementary frames, O O, pivoted at a, at the inner ends, while the' outer ends are adjustable to any angle, by means of slots, b, and set-screws, c.

In these supplementary frames are mounted pulleyshafts, D D, carrying cutter-heads, E E.

Around the shafts pass bands, d d, connecting with 'a long pulley-shaft, G, below, running the length of the machine.

A triangular, or mitre-table, H, rests over the inner ends of the cutter-tables, running, preferably, upon ways, f f, of the latter, and ccntring between the cutter-heads E E.

This table has, in the proper place, a fixed clamp,

g, and a sliding one, g', the latter being attached to a 'i slide, h, which rests in a suitable grooye, or way, i, of

the table, to move out and in. The operation is as follows:

The cutter-tables B B are first adjusted to the proper distance apart, to correspond withthe length of the stu" to be dressed. The supplementary cutterframes G O are then turned on pivots a, to set the cutter-heads to the proper angle, to correspond with the mitre to be cut. The stui -is then placed between clamps g g', and clamped firmly in place, and the mitre-table is moved up on the ways ff, so as to bring the ends ofthe stuii in contact with the two cutters,

'when the mitre of both ends will be cut at once.

The special advantage of this machine consists -in the'adjustability of the tables toward and from each other, whereby the length of the stick is gauged; the angular turning of the cutters, whereby the mitre is determined, and the employment of the long pulley shafts G D D, whereby, in whatever position the tables and cutters may be, the motion is readily transferred automatically.

This latter arrangement is essential to allow the ready adjustment of the parts.

In this connection, vthe construction and arrangement of the mitre-table are of much importance in holding the stuii` which .is being' cut at both ends.

The clamps g g readily fit the narrow stuil of which picture-frames are made, and clamp yit in place as it is pressed to the cutters.

What I claim as my invention, and desire `to secure by LettersPatent, is

l The arrangement of two cutters, E, and their adjustable frames O, at angles to each other, and relatively tothe V- shaped table H, as shown, and for the purpose described.

' 2. The arrangement, upon the mitre-table H, of the xed clamp g, and themovable clamp g', with its sliding handle, when the parts are adapted to operate as herein described.

In witness whereof, I have hereunto signed my name, in the presence of two subscribing witnesses.

JOHN H. BROWN. Witnesses:

N. P. B.' WELLS, p M. 0. RUNDALL. 

